<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片列表区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 下一行还有个index值没写,就是item1后面那个p79补习 -->
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级 -->
              <el-col span="5">
                <el-tag closable @close="closeRoleRight(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级 -->
              <el-col span="19">
                <!-- 通过循环嵌套渲染二级 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="closeRoleRight(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3, ) in item2.children" :key="item3.id" closable @close="closeRoleRight(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="setRoleRight(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <el-dialog title="分配权限" :visible.sync="setRoleRightVisible" width="40%" @close="setdefKeyClose">
      <el-tree :data="rightList" :props="treeProps" show-checkbox node-key="id" default-expand-all  :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
      <el-button @click="setRoleRightVisible = false">取 消</el-button>
      <el-button type="primary" @click="allowRight">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      // 分配权限对话框控制
      setRoleRightVisible: false,
      // 所有权限列表数据
      rightList: [],
      // 树形控件属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 获取权限位置 id 的数组
      defKeys: [],
      // 当前即将分配权限的id值
      roleId: ''
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    // 获取所有角色列表
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.roleList = res.data

      // console.log(this.roleList)
    },
    // 删除指定id的权限
    async closeRoleRight(role, rightId) {
      const confirmresult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmresult !== 'confirm') {
        return this.$message.info('取消了删除')
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }

      role.children = res.data
    },
    // 分配权限
    async setRoleRight(role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      // 把获取的权限数据赋值到data中
      this.rightList = res.data
      // 通过递归获取三级节点的id
      this.getDefKeys(role, this.defKeys)

      this.setRoleRightVisible = true
    },
    // 通过递归获取角色三级节点的id,并赋值到defKeys中
    getDefKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getDefKeys(item, arr))
    },
    // 重置角色权限id的close函数控制
    setdefKeyClose() {
      this.defKeys = []
    },
    // 点击分配权限
    async allowRight() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

      if (res.meta.status !== 200) {
        return this.$message.error('获取请求失败!')
      }
      this.$message.success('获取请求成功!')

      this.getRoleList()
      this.setRoleRightVisible = false
    }
  }
}
</script>

<style lang="less" scoped>

.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
